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May 9, i933. F. MUTER 1,907,857

INSULATING TIE UNIT Filed NOV. 6, 1931 Patented May 9, 1933 UNITEDl STATES PATENT OFFICE LESLIE F. MUTER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MUTER COMPANY, :OF ,n Y

CHICAGO, ILLINOIS, A CORPORATIONI 0F ILLINOIS TNSULATTNG frrE UNIT Application iled November The present invention has to do with an electrically insulated unit for joining circuits in a radio set and particularly to the construction thereof.

As the manufacture of radio sets has deu veloped to the stage of mass production with a conventional assembly line, forms of units adapted to this type of assembly are sought.

It is not always possible or practical to carry the whole of a radio chassis along a single assembly line and place additional parts thereon at succeeding stations. On the contrary, parts of the electrical hook-up are better assembled along branch lines to be later incorporated into the chassis at a junction of these branch lines with the main assembly line. Therefore, practice has proven production is materially increased by forming certain separate assemblages com* pactly, and with the terminals thereof in a definite, standard and accessible position. To obtain the condition of having the ter- -minals definitely afliXed upon a given unit, a scheme has been adopted to carry the ends of all leads, eventually to be joined to other units, to a terminal block upon the body of the unit. The terminal block forming the Vsubject of this invention provides a plurality of electrically isolated terminals suitable for the engagement of leads.

It. is an object of the present invention to provide an insulated tie unit comprising an effective but simple construction, and requiring a minimum of operations for its formation.

Another object of the present invention is to provide a unit with electrically insulated terminals having a unique structural design whereby the quantity of insulating material is decreased.

Still another object ofthe present invention is to provide an insulating tie composed only of rugged ymaterials and of an improved form lending to rapidity of congregation.

These, and such other objects as may hereinafter oppear, reside in the novel arrangement, construction, and Vcombination of the constituent parts of this invention fully set 6, 1931. Serial No. 573,374.

forth in the following description` and illustrated in the accompanying drawing hereby made a part of this specification and in which like reference characters refer tol similar parts, and in which Figure 1 is an Orthographie projection of one form of the invention as viewed from above;

Figure'2 is a cross sectional view of the invention corollary to Figure 1, and taken along the line 2 2 of Figure 1;

Figure 3 is a plan View of a different form of the invention; v

Figure 4 is an elevated cross section of the device shown in Figure 3, and as indicated by the line 4 4 thereon; and.

Figure 5 is a fractional view of a still different form lof the invention taken in perspective.

Y In Figures 1 and 2, a sheet metal shell 10 is shown. The shell 10has at either end earlike members 11 which contain apertures 12 as a means for inserting holders for the.

unit. The term unit hereafterwill include 'the assemblage of the invention as a whole. In addition to the projections 11, the shell 10 presents longitudinal and parallel 1edges 13 which are symmetrically articulated one hundred eighty degrees `with. reference to a back section 14 to assume .an inwardly directedl and oppositely disposed position.

Incident to the foregoing bending operation, a series of metalterminal posts 115 and a strip of `insulating material 16 intermediate said tabs and the shell 10, are similarly deformed to lie contiguous to the inner wall of said casing. The material 16 is articulated from either end of a backv section 17, one hundred eighty degrees to extend as sides 18 parallel to said back member, until a normal turn is taken to effect bosses 19.

From the upper and outer end of post 15 y the post 15 after a reverse` bend therein at 22 terminating side 21 forms a back 23. A second one hundred eighty degree contorroo tion 24 terminates in an Vextension 25 opposite tothe section designated by the numeral 21.

Notation is made at this point that the units heretofore made contain between the sides 21 and 25, and the back 23, an auxiliary strip of dielectric material. The presence of this costly member is of no utility. It is present because of custom only. The insulated terminal units as first used were articulated in a similar manner about a flat strip having a section thereof wound with resist; ance wire, and with other like appearing lugs making contact with said wire.

It is readily conceivable that in such an arrangement where part of the posts necessarily had a material within their clasp, the same bulk would be obligatory in respect to all of the posts in order that uniform compression of the edges 13 would effectively engage all of said lugs for retention. Since the dead lugs had always enclosed a bakelite strip within the fold of the base, this practice has been unnecessarily carried over into terminal units comprising only insulated lugs. i

The presence of an inner and supernumerary insulating strip increases the cost of the unit by a considerable percentage, be-

sides contributing materially to the number of dexterous operations required to form the unit. Even when extreme care is taken, this strip which the present invention omits is often askewed from place incident to the enfolding process with the result that it is mutilated. Such an imperfect element of course makes necessary the discarding of the Y Vouter edges 37 of which are intermediateV entire unit.

Figures 3 and 4 disclose a unit quite similar torthat above described but having a different form of lug 30 providing two tongues 31. A metal shell 32 having `ears 33 at either end and integral with the back 34 is deformed longitudinally to comprise opposed and complemental flanges 35. Clamped snugly within the casing 32 to lie contiguous to Vand coextensive with the inner surface thereof is a sheet of insulating paper 36 the Vindependent connection of an electric lead to each.

The provision of a double point of connection to a Ysingle lug is especially advantageous for the reason that a second subse- 56 of dielectric material is had within the back 50 by the compression of the opposed elements of gutters 53. Within the resultant pocketbetween platens 55 and 56 is the base 57 of an angular met-al post 58. The section 59 of the post 58 normal to base 57 projects through an aperture 60 provided in insulating layer 55 and for registry therewith. An aperture'l is placed in lug 58 to facilitate the connection ofan electric conductor thereto.

Although all units described and shown in the drawing include a fastening means at either end, but one only of such fasteners need be employed.

I claim:

1. An assemblage of insulated terminal posts of flat strip metal each comprising a base, and a tongue, and in which there is a metal 'cover Vhaving oppositelyV disposed gutters, and a dielectric jacket intermediate said gutters and 'having a longitudinalopen- Iing, said bases being confined within said jacket with their tongues through said longitudinal opening.

2. An insulated tie unit comprising a body with upturned and inturned edges and extensions to receive fastening means, a plurality of terminal clips of Hat strip metal each having a base and a tongue, v and a sheet of dielectric material within said body and over said clip bases, and with its edges extending upwardly along said tongue,

protruding the upturned and inturned edges of said therefor, a plurality of terminals in said en- Y closing member, each of said terminals comflee prising a metallic strip folded at its middle to be seated in said enclosing member with its ends projecting outwardly of said enclosing members and angularly away from one another, andl a sheet of insulatory material in said enclosing member and extending around the Vmiddle section of said terminals and uprthe exposed ends thereof.

Y LESLIE F. MUTER.V

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